Definition of aboral in English:

adjective

The mouth leads to the intestine and anus, which is located in the center of the aboral surface in regular echinoids.

It is composed of only four plate circlets (three infrabasals, five basals, five radiais, and five orals), it lacks anal plates, it has radials without radial facets or arms, and the anus is along the side of the aboral cup.

The interambulacrum of Meekechinus contains only three columns of plates, which is more similar than the aboral side of Pronechinus to the interpretation of the interambulacrum of the Brownwood echinocystitid.

Fraction A contained the mesocolic or perirectal tissues around the tumor and 1 cm away in both oral and aboral directions.

It is equally clear that the region aboral to the marginal frame is a part of the perforate extraxial body wall (with the possible exception of the centrodorsal, which is likely imperforate extraxial).

Members of the phylum Ctenophora bear some general similarities to cnidarian medusae including a gelatinous mesenchymal layer and a symmetrical organization around an aboral / oral axis.